I use miracle-gro all-purpose slow release. Shake it on every 3-4 months. When I transplanted them, I mixed garden mix with cow manure and egg shells (organics), pine needles (acid and aeration), moss (soil humidity). If you do not plan to transplant, add a few drops of white vinegar every time you water will do the trick. When the branches are long like mine, they are like vines and easy to train.Thanks a lot!What kind of fertilizer do you use? How to keep it in mild acid? Thanks again!
Good luck and enjoy!